Epic solution... surprisingly pretty readable for how many conditionals are in this problem vs the length of this solution

Nice one.. This one seems tricky to get down to a concise amount of code. Mine was a bit too long to be readable, although it is a very straightforward solution. Yours does basically the same thing but is quite concise, so it's good to learn from. Sometimes it's really hard to read the super short solutions especially on problems like this

I'd agree.. It's not a "simple string reversal"... which would be 7-kyu worthy. The task at hand here easily bumps it up 2-3 levels of difficulty

This is along the lines of what I was trying to do. I gave up because I was wasting too much time and couldn't quite get it. But this is exactly what I was trying to do. And this is very straightforward and readable.

This solution looks very fancy but is completely unreadable in my opinion. I can't make a lick of sense of it. I'd love to learn something from it but I'm having a very hard time understanding what's going on.

Strong agree. The problem it is equivalent to is 7 kyu, but unless you know that (or realise it quickly)...

Difficulty is very subjective, but I suggest that this kata becomes 6 kyu. Is it technically possible to change the difficulty rating of a released kata?

This kata is way too difficult to be ranked at 7kyu in my opinion. This is pretty much a discrete math problem, not a coding one

This solution is the same basic idea as mine, but a much cleaner refactor. This is what I struggle with -- coming up with the cleanest looking solution. My logic is there, but getting it down to a solution that looks really concise is quite challenging. It's helpful to see this!